A situation caused by two or more processes being unable to proceed (and thus release their locks) because they are blocked by locks on resources held by the other process.

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5
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1answer
381 views

Deadlock free MERGE-alike in MySQL?

I am trying to implement some parts of MERGE in the MySQL driver in Drupal. Of course, Drupal has something but in truth it only works because the most frequent MERGE issuer just eats exceptions. So, ...
2
votes
1answer
65 views

Why does Deadlock occur for this INSERT/UPDATE combination despite seemingly holding an X lock?

I am regularly seeing deadlocks in a production MySQL 5.5 database but cannot determine exactly what the cause is. For context, we're inserting new records into a database which are triggered by ...
2
votes
1answer
193 views

Oracle Ref Partitioning: Deadlock due to child table row migration

My ordering application uses Oracle 11g Database. This DB has a primary table ORDERS and multiple child tables like ORDER_DETAILS, PLAN etc. ORDERS table is LIST partitioned on STATUS column and all ...
2
votes
1answer
98 views

Multi-victim deadlock in SQL Server

I have been seeing a lot of deadlocks occurring on a system with deadlock graphs similar to this one: I have been advised that it is a multi-victim deadlock but I cannot re-create a deadlock graph ...
1
vote
1answer
68 views

How do Locks Work in MySQL or MariaDB

There is a case which makes me a bit confused. As far as I understand deadlocks should appear if there are two query statements (including subqueries) in request (each transaction). So the ordering of ...
1
vote
1answer
37 views

Help understanding InnoDB Deadlock Detection

I have a deadlock occurring when executing an Update and a Select in seperate threads but I'm not sure what can be done about it. Previously my understanding was that this could happen in parallel but ...
1
vote
1answer
169 views

Increased server load after InnoDB deadlock

I am using InnoDB instead of MyISAM for a couple of months right now, and it has really optimized my game database-wise. I was aware of the danger of deadlocks, but hadn't had any problems with it, ...
0
votes
1answer
14 views

ORA-24033 : No recipient for message has been detected

I am using Oracle E-business Suite R12.1, 11G database version. Error I encountered when trying to create or modify a user or responsibility: ORA-24033 : no recipient for message has been ...
0
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1answer
121 views

SQL Server 2012 - Deadlock happening daily

We have a performance issue with a 3rd-Party application using SQL Server 2012: deadlock happen at least 10 times an hour. The server is virtual server on VMWare 5.5 with PVSCSI adapter in persisted ...
0
votes
1answer
223 views

Debugging lock time out with show engine innodb status

I am keeping getting this lock wait time out. Below is my current settings. [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql # Disabling symbolic-links is recommended to ...
0
votes
1answer
105 views

Missing statement information from 'LATEST DETECTED DEADLOCK' InnoDB status output

I'm learning how to interpret the LATEST DETECTED DEADLOCK section in the output of SHOW ENGINE INNODB STATUS, and had a question about the output. Some sample output of SHOW ENGINE INNODB STATUS ...
0
votes
1answer
1k views

Deadlock caused by INSERT trigger - thread looking for lock it already has?

Using MySQL 5.6.17. I have a table with an INSERT trigger that reads values from that table and 4 other tables, combines the results and writes that to a sixth table. Ever since I added this trigger, ...
0
votes
1answer
546 views

MySQL: Transaction and Deadlock

I have table "tbl_data", where have a lot of rows (3 - 5 million). I have JAVA (*.jar) module from which I INSERT/UPDATE data into this table. If I start *.jar file (for example, "run.jar") and after ...
11
votes
0answers
256 views

SQL Deadlock on the same exclusively locked clustered Key (with NHibernate) on delete / insert

I have been working on this deadlock issue for quite a few days now and no matter what I do, it persists in one way or another. First, the general premise: We have Visits with VisitItems in a one to ...
5
votes
0answers
108 views

Complete deadlock on PostgreSQL 9.3 after removing a numeric id

The problem - complete DB lock after a schema change Architecture I use a PostgreSQL 9.3 with PostGIS to store location updates. The updates are written to two tables - location_updates and ...
3
votes
0answers
28 views

MySQL queries waiting for other queries to finish

We have 30-40 different projects in Python and PHP that update, insert and select more than 1 million rows of data in MySQL DB every day. Currently we use InnoDB Engine for our tables. The problem: ...
3
votes
0answers
89 views

Read/Write Deadlock on Ms-Sql Server

We are facing deadlocks when store procedure is concurrently executed. We are using Microsoft SQL Server 2008 R2, concurrent execution is done with java executing multiple request of sp. I have ...
3
votes
0answers
136 views

How to set ALL the replication to DEADLOCK_PRIORITY LOW?

I have just got this email here: Then looking at the sql server log I find this deadlock was caused by one of our procedures (that was the victim) against the replication. O.K. in this case in ...
2
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0answers
59 views

SQL Server Check Constraint Lock Order

I'm having problems with SQL Server 2012 filetable. Filetable defines an check constraint on a path_locator field with definition as: /*ParentsAreDirectories*/ ...
2
votes
0answers
82 views

Why is this update creating a deadlock?

I have these queries: (This one was deadlocked) And this one: update tbldealerativacao set flagusado = 0 from tbldealerativacao WITH (NOLOCK) inner join tbldealerusuario WITH (NOLOCK) on ...
2
votes
0answers
127 views

innodb update with limit locks all matching (ignores limit)

For a query similar to this: UPDATE myinnotable1 SET value=5,updated=now(),status=1 WHERE status>10 AND message="match msg" LIMIT 1; I found that innodb engine locks ALL rows matching criteria ...
2
votes
0answers
28 views

Locks while stream reading and deleting/inserting involving the same tables?

I have a question regarding a potential block/lock situation: I am reading data using a select command, which is then modified externally and uploaded to a temporary table. A stored procedure will ...
2
votes
0answers
94 views

Deadlock when CODES table has 41900 rows

I'm having a deadlock accessing the same table from two different jobs. I'm testing it on a SQL SERVER 2012 Enterprise edition. Running SQL Profiler I get this graph: You can find the SQL Server ...
2
votes
0answers
287 views

Read-Commited Snaphsot isolation causing deadlocks?

Our DBA has some type of process setup to monitor deadlocks and sends out an emails when a deadlocks occurs. We have been testing read committed snapshot isolation on our application for a couple ...
2
votes
0answers
4k views

Oracle Select Query Over Database Link Suddenly Hangs Endlessly

I have a query that's been in use for years and today it started hanging endlessly. I took the query apart and found the piece causing it to hang is a simple join on a primary key that should run like ...
2
votes
0answers
418 views

SQL Server 2008 R2 - Deadlock Trace, Need Help Understanding It

I really need help on understanding this deadlock, i've already replaced the values, mind if anyone helps me interpreting where my deadlocks are coming from? What does e_waitpipegetrow mean? btw, i'm ...
1
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0answers
29 views

Index on a highly updated field causing excessive locks in SQL server

I'm in a bit of a conundrum about what the best course of action on this (bad?) index is. I have a table which i use as a notification holder that i watch for database changes with. CREATE TABLE ...
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0answers
57 views

How to resolve Innodb lock

I am trying to run a sitemap generator job for Magento and here is what I get as Innodb status after the query has failed to complete even after several hours. I do not know much about DBA stuff and ...
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vote
0answers
48 views

Is this query actually working?

This is from show engine innodb status ---TRANSACTION 4FF4, ACTIVE 43350 sec, OS thread id 6232 fetching rows mysql tables in use 2, locked 2 480318 lock struct(s), heap size 46578104, 48647170 row ...
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0answers
58 views

MySQL deadlock in simple table

I'm having a deadlock issue that I don't get. Possibly it's because of the composite index (idSite,timestamp). Maybe it's range locking on it? I have this table: CREATE TABLE `logs` ( `idLog` ...
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0answers
201 views

MySQL - Preventing lock wait timeout when deleting rows from self

I have a table of around 500k rows (not big data), that I need to query against itself and then delete some of the rows which don't match the filters. At the moment my query looks like this: DELETE ...
1
vote
0answers
82 views

Why does this deadlock occur?

We're using MySQL with the INNODB storage engine. The account table is accessed by two different transactions. We didn't expect a deadlock because only one transaction is holding a lock (2): ...
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0answers
171 views

SQL server deadlock graph explained

I am testing a scenario or recurrent request that ends up in executing the following store procedure simultaneously ALTER PROCEDURE [dbo].[clear_class]( @classID [int]) AS BEGIN DELETE FROM ...
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0answers
80 views

InnoDB Deadlocks Involving Currency Transactions

We're dealing with InnoDB deadlocks that are affecting our virtual transaction system. LATEST DETECTED DEADLOCK 150210 20:51:03 *** (1) TRANSACTION: TRANSACTION 0 4240405649, ACTIVE 0 sec, process no ...
1
vote
0answers
1k views

exec sp_getapplock - Different behaviour using go or without go

we have a strange behaviour while using sp_getapplock (we tried to use this to solve a problem with a deadlock involving some insert while another session was trying to execute a ALTER SWITCH ...
1
vote
0answers
285 views

What do spikes in InnoDB lock structures indicate?

I co-maintain a high traffic site similar to StackExchange. It runs MySQL 5.1 (working on replacing it with MySQL 5.5 or MariaDB). All our tables are InnoDB. MySQL goes down a couple of times a day. ...
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0answers
740 views

SELECT + INSERT + Query Cache = MySQL lock up

MySQL server seems to constantly lock up and stop responding on certain types of queries and eventually (after couple of minutes of not responding) give up with an error "MySQL server has gone away", ...
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0answers
244 views

Why Am I Getting Deadlock - Please Read Trace

can anyone help me? i'm getting deadlock on this trace, i'm using symmetricds and i can't understand why i'm getting a deadlock on a certain table. I'm using sql server 2008 r2, ...
0
votes
0answers
29 views

database Deadlock again

Once again I have a deadlock problem with the following log: [17/03/16 16:42:20.020 -0300] FATAL OPERACIONES: SQLException: CreateEquipo: ERROR: deadlock detected Detail: Process 2923 waits for ...
0
votes
0answers
28 views

Resetting deadlock count statistics

It seems that just restarting the PostgreSQL service doesn't clear / reset the detected deadlock count. How can it be restarted to zero? select version(); PostgreSQL 9.4.5 on ...
0
votes
0answers
56 views

How can I avoid this deadlock in MariaDB?

I saw that I got a deadlock in a MariaDB cluster. I have 3 cluster database. What should I do to avoid that? 160211 16:29:02 *** (1) TRANSACTION: TRANSACTION 75AB6B17, ACTIVE 0 sec starting index ...
0
votes
0answers
50 views

mariadb error transaction deadlock

I use galera cluster with 4 nodes, mariadb, we insert nearly 12million data. Insert task was finished. However we have lost 11000 data. I don't know where they go. In error log it writes; 151220 ...
0
votes
0answers
35 views

How system resolves when particular resource lock at uncommitted transaction

Let us assume Transaction T1#: Initiated on 2015-10-30 10:25:41.380 Transaction T2#: Initiated on 2015-10-30 10:25:41.580 The above two transactions are initiated through application. T1# & ...
0
votes
0answers
78 views

How to avoid deadlocks when running queries on a remote server

I need to pull data from many different systems, all on remote, LIVE SQL Servers into one place for a one-off piece of work that will last a few weeks. This has to be run multiple times during the ...
0
votes
0answers
55 views

mysql deadlock issues

we are having starnge deadlock issue. We have a deadlock in mysql and it appears conitously when we run engine innodb command. the webserver it is comming from do not exist as we have manually killed ...
0
votes
0answers
287 views

Deadlocks due to foreign keys (MySQL)

We are in the process of creating a web application using mysql as a data source. We are using spring with hibernate as an ORM framework. We have hundreds of entities with relations (manyToMany \ ...
0
votes
0answers
122 views

InnoDB says I'm in Deadlock when it should not be

I'll do my best to explain the situation. I'm at a complete loss. Preliminaries I'm running a Java Web Application in Tomcat 7.0 using a JDBC Connector to communicate with my MySQL Database. The ...
0
votes
0answers
54 views

Is it possible for a SELECT-only stored procedure to deadlock on itself?

Environment is Microsoft SQL Server 2012. Is it possible for a stored procedure consisting exclusively of SELECT statements to deadlock on itself? That is the report I am getting from a vendor for ...
0
votes
0answers
560 views

Single DELETE statement deadlocking in Sybase ASE

I've got a fairly straightforward process running on ASE 15.7, that creates rows in two tables and later deletes them. The tables are both configured to use datapages for the locking scheme, and the ...
0
votes
0answers
169 views

Lock timeouts on a table with two keys, where only one connection writes for a given value of the first key at a time

I have a table user_rollup_message_list that is keyed by (user_id, message_reference). It is a write-heavy table, and gets enough writes that I get many lock timeouts, with a timeout of 50 seconds, ...